Jan Koum reportedly differed with WhatsApp's corporate parent over encryption and user privacy.
Facebook bought WhatsApp for $19 billion in 2014.
Koum allegedly frightened her to the point that she would lock herself in the bathroom to hide from him.
Mark Zuckerberg is rapidly collecting a portfolio of dominant, social media properties - each performing nicely on its' own and become even more powerful if integrated. Twitter sits in that bullseye.
As the world continues to watch the escalating political uprising and violent protests in Kiev, it's important to understand that there have been some remarkable success stories to emerge from behind the Iron Curtain.
* To add voice calls in second quarter - WhatsApp CEO * WhatsApp, other messaging apps already offer free texts * Move could
In a land of pushy 20-something wunderkind CEOs, WhatsApp's Jan Koum is a 37-year-old black sheep who just wants to build a great product without media attention. No muss, no fuss.